Hashing function gives different output when running Maven JUnit tests on Jenkins

As the title says, have this function which takes as arguments a ByteArrayResource and a String representing the name of the algorithm to use.

I'm using java.security.MessageDigest with GnuCrypto and BouncyCastleProvider providers.

I'm having some issues identifying what the problem could be, both my machine and the Jenkins one are running java 11, here's the code:

Test:

void hashOk{
	byte[] bytes = Files.readAllBytes(Path.of("path/to/file.xml"));

    String hash1 = "5EDF3285285FDABCFFB7019E2442B31F";
	String hash2 = hashService.hash(new ByteArrayResource(bytes), "MD5");

	Assertions.assertEquals(hash1, hash2);
}

Service:

public String hash(ByteArrayResource obj, String algorithm) throws NoSuchAlgorithmException {
    Security.addProvider(new BouncyCastleProvider());
	Security.addProvider(new GnuCrypto());

	var md = MessageDigest.getInstance(algorithm);

	try (DigestInputStream dis = new DigestInputStream(new BufferedInputStream(obj.getInputStream()), md)) {
		byte[] buffer = new byte[1024];
		while (dis.read(buffer) != -1) ;

		byte[] hash = md.digest();

		return DatatypeConverter.printHexBinary(hash).toUpperCase();

	} catch (IOException e) {...} }

Am I missing something?

These are the results of the test, where "hash1" is the control string and "hash2" is the generated one:

Local MD5

hash1: 5EDF3285285FDABCFFB7019E2442B31F
hash2: 5EDF3285285FDABCFFB7019E2442B31F

Jenkins MD5

hash1: 5EDF3285285FDABCFFB7019E2442B31F 
hash2: 7A7E0BBA2452963746BA4D71EB8CCFA3 

I've also tried on a different machine with Jenkins and it gives the same results.

Some solutions I found were just a different arrangement of the same code (and I tried them).

There's one which told me to change the pom.xml and set the forkCount property to 0 on the maven-surefire-plugin, but that gave me an exception because it couldn't find the file for the hashing test (?).

I solved the problem, it really was an issue with the reading of the file.

After I've put the file content in a single line and changed the code to read that file one time only instead of once per test it all worked.

Thanks for the help!